XML 50 R26.htm IDEA: XBRL DOCUMENT

Segment Information	12 Months Ended
Segment Information	Dec. 31, 2017
Segment Reporting [Abstract]
Segment Information	Segment Information Our primary business is the ownership and operation of office properties, and we currently have one reportable segment. More than 95% of our revenues for the year ended December 31, 2017 are from office properties.